1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
[](https://github.com/idanarye/rust-smart-default/actions)
[](https://crates.io/crates/smart-default)
[](https://idanarye.github.io/rust-smart-default/)
# Rust SmartDefault
Custom derive for automatically implementing the `Default` trait with customized default values:
```rust
use smart_default::SmartDefault;
#[derive(SmartDefault)]
enum Foo {
Bar,
#[default]
Baz {
#[default = 12]
a: i32,
b: i32,
#[default(Some(Default::default()))]
c: Option<i32>,
#[default(_code = "vec![1, 2, 3]")]
d: Vec<u32>,
#[default = "four"]
e: String,
},
Qux(i32),
}
assert!(Foo::default() == Foo::Baz {
a: 12,
b: 0,
c: Some(0),
d: vec![1, 2, 3],
e: "four".to_owned(),
});
```
Requires Rust 1.30+ (for non-string values in attributes)
|
